Insulator.



W. G. CLARK. INSULATOR. APPLICATION FILED JULY 27, 1906.

91 8, 127. Patented Apr. 13, 1909.

- FIG-2.

Z6 M @VENTO 74 BY r M Mm ATTORNEY.

" op w ri a re n in Lin J: zi J1} ii LJJZLAO WALTER G. CLARK, OF NEWYORK, N. Y.

INSULAT GB.

To all whom it may concern:

Be it known that l, /VAL'rn-s G. CLARK, of the city, county, and Stateof New York, have invented a new and improved lnsulator, of which thefollowing is a full, clear, and eXact description.

My invention relates to improvements in wire insulators, and moreparticularly to insulators such as are adapted to carry transmissioncables or heavy wires.

The object of my invention is to produce an exceedingly simple structurewhich can be cheaply and easily made, which will enable a line to bestrung with great speed, and which will especially hold the wire in sucha way that it cannot accidentally become loose. in cari ing out thisidea I provide the top portion of the insulator with a wire receivingrecess or hole and make the entrance to the said hole or recess of aboutthe size of the wire or cable to be carried while the recess is itselflarger. This enables me to put a binding of any suitable sort around thecable or wire, and within the hole, which obviously makes the cablelarger than the receiving slot, and so it cannot accidentally get out.The construction of the insulator also enables me to insert a retainingplace above wire or wires applied to the insulator and the said platemay be caused to engage the shoulders for confining the wires. Theessential feature of my invention lies in the fact that the hole orrecess which carries the wire or cable is larger than its entrance slot,and obviously the cross section of the wire recess or hole can be variedindefinitely without allecting the invention.

With this end in view, my invention consists of an insulator having awire receiving hole or recess with an entrance slot through theinsulator body which slot is'narrower than the aforesaid hole or recess.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

l igure l is a plan view of an insulator showing my improvements. 2 is aside elevation of the same. lg. 3 is a broken elevation showing amodified term of the wire recess, and 4 shows another modilication ofthe structure.

The insulator may be, so far as its body is concerned, of any kindwhatever, and I have shown the ordinary petticoat 10 which can have asuitable base or fastening means, and

Specification of Letters Patent.

Application filed July 27, 1906.

Patented April 13, 1909.

Serial No. 328,01

which has a head 11, the latter being constructed so that by preferencea groove 12 for a binding wire is formed on the neck of the insulator.lhis, however, is un'npor tant. The top of the insulator is slotted, asshown at 16, and the insulator is provided vith a transverse recess orhole let, in which the transmission cable or wire rests. As shown inligs. 2 to l, it will be seen that this hole or recess 14 is wider thanthe slot 13, and the latter should be of such a width as to permit thetransmission cable or wire to barely pass through into the recess orsocket 14, after which any suitable binding device can be slipped inaround the wire, and will prevent the latter from rising out oi? theslot 13.

In Fig. i I have shown the recess or socket 14 provided on its upperside wall with recesses 15 in which fastening wedges or devices can beplaced, and in Fig. 3 l have shown shoulders 16 which will engage astrip of material driven in above the wire, and will effectually preventits displacement. Obviously a strip of material driven in above thewires and under the shoulder 16, will confine the wires under theopening. it the opening is nearly filled with wires then the stripinterposed between the wires and the shoulders would be rather thinwires and if only a few 'wires were in the opening, the thickness of thestrip could be such as to press on the wires and against the shoulder.is shown in ll'g. l, the width of the strip applied between the wiresand the shoulders would determine the capacity of the opening below thestrip. By the invention presented, it will be observed that provision ismade for the retaining strip confining the wires and engaging the wiresand the shoulders of the insulator and by using plates oi dill'erentdimensions, the capacity of the opening below the plate may becontrolled.

Obviously very many fastening devices can be used for securing thetransmission cable or wire, and l have shown some of these in anotherapplication, which .i am filing simultaneously herewith, and in thiscase, I wish it clearly understood that the fastening means for the wirehas nothing whatever to do with the invention. It is essential that theintake slot and the wire socket which communicates therewith extendacross the insulator so that the wire can be readily inserted, and it isalso necessary that the restricted slot should be of essentially thesame length as the socket or wire hole so that the overhanging partswill not be too greatly weakened, and thus a fastening device of somekind can be safely secured be tween the wire and the narrower walls or"the socket. I am aware that attempts have been made to use insulatorshaving a wire socket with a restricted intake, but so far as I know,such devices have had the walls of the wire socket more or less wedgeshape, so that avedgingdevices could be placed between the wire and thewalls, but this structure does not work well in practice because thestrain on the wedging devices causes the walls to be very readilybroken, and the insulator is thereupon worthless. In carrying out myinvention, the wire receiving socket or hole should have its wallsessentially parallel, so that there is no wedging strain on the wallsnear the opening therethrough.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent,

1. Ian s'lot'and a restricted opening leading thereto, said insulatorhaving a recess forming a con- 'tinuationof the receiving slot, andshoulders WARREN B. HU'rcHr soN, MARY A. S. MOELLER.

insulator having a wire receiving

